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Related Experiment Video

Updated: Feb 5, 2026

Odorant-induced Responses Recorded from Olfactory Receptor Neurons using the Suction Pipette Technique
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Neuronal Response Latencies Encode First Odor Identity Information across Subjects.

Marco Paoli1, Angela Albi2, Mirko Zanon3

  • 1Center for Mind/Brain Sciences, University of Trento, Rovereto 38068, Italy and albrecht.haase@unitn.it marco.paoli@uni-konstanz.de.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|September 12, 2018
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Summary

Honeybee olfactory responses show a conserved order of glomerular activation, enabling fast odor identification. This temporal coding, based on response latencies, complements spatial patterns for reliable scent detection.

Keywords:
calcium imaginghoneybeelatency codingodor codingolfationtwo-photon microscopy

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Area of Science:

  • Neuroscience
  • Olfactory Coding
  • Animal Behavior

Background:

  • Odorants are encoded by spatial and temporal patterns in the olfactory centers.
  • The spatial structure of odorant responses is conserved, but temporal structure's universality is debated.

Purpose of the Study:

  • To analyze the early phase of neuronal responses, specifically activity onset latencies.
  • To investigate the conservation and predictive power of temporal coding across individual honeybees.

Main Methods:

  • Fast two-photon calcium imaging of antennal lobe projection neurons in honeybee foragers.
  • Analysis of early neuronal response onset latencies to various odorants.

Main Results:

  • Each odorant elicits a unique response latency pattern across glomeruli.
  • The order of glomerular firing onsets is conserved across individuals.
  • Response latency patterns reliably predict odorant identity, but not concentration.

Conclusions:

  • Neuronal response latencies provide an early code for rapid odor identification.
  • The rank order of glomerular activation is conserved and predicts odor identity with accuracy comparable to response amplitude.
  • Temporal coding offers complementary information to spatial coding in olfaction.